Friction device for yarn spools



Nov. 2 1926. 1,605,232

E. R. HOLMES FRICTION DEVICE FOR YARN SPOOLS Filed Feb. '29. 1924 INVENTO E ELR. OLMES A QRNEYS Patented Nov. 2, 1926.

UNITED STATI-:s PATENT orties.

ELBRIDGE R. HOLMES, OF WORCESTER, MASSACHUSETTS, ASSIGNOR TO CRCMPTON t KNOWLES LOOM WORKS, OFv WORCESTER, MASSACHUSETTS, A. CORPORATION F MASSACHUSETTS.

FRICTION DEVICE FOR YARN SPOOLS.

Applicationled Februaryy 29, 1924.

presented to the warps by frame holders especially provided for that purpose.. It

has been customary to provide a separate friction device for each yarn spool but it has been found that` these friction devices vary widely in their holding effect and that itis notpractical to. keep the friction uni form on different spools. Nevertheless, it is extremely desirable that the resistance to "i rotation of thespools, as t-he'yarn is drawn therefrom, shallbe maintained substantially uniform. v

It is the general object of my invention to provide a substantially uniform tension l for successive yarn spoolsas the tuft yarn is drawn therefrom. In the preferred form,

normally operative frictionl devices are provided which hold the-spools from rotation during the transportation thereof. Additional or supplementary friction devices arel also provided for each yarn spool, which latter devices are brought into uniform operation as the tubeframe is receivedin the frame holders. At the same timeY the normally operative tension devices are preferably rendered inoperative.

My invention further relates to arrangements and combinations of parts which will be hereinafter described and more particularly pointed out in the appended claims.

A. preferred form o-f the invention is shown in the drawings, in which- Fig. 1 is a front elevation of a portion of a yarn spool and a supporting tube frame; the head of the spool being shown in section;

Fig. 2 is an end elevation of the parts shown in Fig. 1;

Fig. 3 is a front elevation, partly in section, showing the parts seen in Fig. 1, together with a frame holder supporting the frame;

Fig. 4 is a side elevation of the mechanism shown in Fig. 3;

Fig. 5 is a detail sectional elevation taken along the line 5-5 in Fig. l1, and

Fig. 6 is a sectional the line 6-6 in Fig. 3.

Referring to the drawings, I have shown a tube frame 10 of a usual construction, on

' pivot 23, without plan view taken alongv Serial No. 696,073.

which a plurality of yarn tubes 11y are mounted in closely parallelV relation.` A,

yarn spool 12 is provided with a stud or bearing 13 which is rotatable in a bearing plate 111 fixed to the end of the tube frame 10. An outer plate plate 15 is alsov provided by tached to a transporting chain, not shown.

The spool 12l is preferably provided with a pressed metal head 16 which is normally engaged by a friction pad 17 mounted upon a flat spring 18 secured to the upper surface of the tube frame 10. The parts thus far described are or may be of the usualy construction, with the exception that the spring 18 is preferably provided at its free end with lateral projections 2O (Fig. 2) for. a purpose to be described.

My invention relates particularly tothe provision of a second friction device for each spool, herein shown as comprising a friction pad 21 (Fig. 1) secured to an arm or plate 22 which is pivoted at 23 upon a bearing support 24e. This support is held in position by folding the outer ends of the support snugly aroundthe plates 14. and 15, as indicated in Fig. 6.

Upward movement of thesupport is prevented by the outward curve of the plate 15, just above the support, and downward movement ofthe support is prevented by providing inwardly projecting lugs 25 which engage shoulders on the plate-14.` The fric.` tion arm 22 normally swings freely upon itscausing engagement of the pad 21 with the spool head 16.

A frame holder 26 of the usual type is provided for detaching the tube frame from its transporting chain and for supporting the tube frame and presenting the yarn tubes between the warp threads. Ihile this yarn holder is, as stated, of the usual type, it has two additional and novel features.

In the first place, cam-like projections 27 extend inward from the holder 26 on each side of the plates 14 and 15 and engage the lateral projections 20 of the spring 18 as the tube frame is detached. By such engagement, the spring 18 is depressed, separating its friction plate 17 from the spool head 16.

TheA frame holder 26 is also provided with a cylindrical portion 28, within which is mounted a plunger 29 yieldingly pressed towhich the tube frame may be at.

los

l Ward the spool head by a spring 30, the tension of which may be adjusted by a screw i i. One of these spring` plungers is provided at each side of the holder 26 in position to engage both lateral projections of the pivoted friction arm or plate 22. Vfith this construction the operation of my improved friction device is as follows As the holder is moved laterally to approach and release the tubek frame, the cam plate 27 engages the projections 2O and depresses the regular friction spring 1S, thus releasing the usual friction upon the spool 1Q. At the same time, the plungers 29 engage the pivoted plate 22 and force the friction pad 2l against the spool head 1G. As the plungers 29 are mounted upon the holder QS, the same plungers apply the friction pressure to each of the successive pools and the amount of friction is thus maintained substantially constant. As the same time, the usual friction spring 1S is permitted to operate during the transportation of the tube frame, when the exact amount of friction is immaterial.

While I have shown and described only one spool end and only one set of parts of my improved mechanism, it will be understood that the parts herein shown and described are substantially duplicated at the opposite end of the tube frame.

Having thus described my invention and the advantages thereof, I do not v'ish to be limited to the details herein disclosed otherwise than as setforth in the claims but what I do claim is :n

1. In a loom, a yarn spool, a tube frame on which Said spool is rotatably mounted., frame holder, means to apply friction to said spool when said tube frame is removed from said frame holder, additional means to apply friction to said spool when said tube frame is supported in said frame holder, and means to render said first friction means inoperative and to simultane ously render said second friction means op erative when a tube frame is received in said frame holder.

2. In a loom, a plurality of yarn spools, a regular friction device for each spool, an additional friction device, and means to ren-l der said regular friction device inoperative and said additional frictional device substantially uniformly operative for each spool, as each spool is presented in yarn delivering position.

S. In a loom, a tube frame, a yarn spool mounted thereon, a friction device on said tube frame for said yarn spool, a second friction device for each yarn spool, a holder for said tube frame, and means on said holder to render said first friction device inoperative and said second friction device substantially uniformly operative upon the positioning` of said tube frame in said holder.

4. In a loom, a tube frame, a yarn spool mounted thereon, separate means to apply friction to each spool when removed from yarn delivering` position, yielding means to apply substantially uniform friction to all of said spools when in delivering position, and means to render said separate means inoperative When said yielding means is rendered operative.

5. In a loom, a tube frame, bearing brachets thereon, a yarn spool mounted in said brackets, a friction pad, springs connecting said pad to one of said brackets, said bracket having a central opening therein, a frame holder, and a spring-actuated plunger mounted in said frame holder and projectthrough said opening to engage said pad and to apply friction to said spool when said tube frame is supported in said holder.

In testimony whereof I have hereunto affixed my signature.

ELBRIDGE R. HOLMES. 

